foo.c: In function 'main':
foo.c:16:9: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   16 |         scanf_s("%d", &n);
      |         ^~~~~~~
      |         scanf
foo.c:27:23: warning: 'i' is used uninitialized [-Wuninitialized]
   27 |         for (int i; i < n; i++) {
      |                     ~~^~~
foo.c:27:18: note: 'i' was declared here
   27 |         for (int i; i < n; i++) {
      |                  ^
/nix/store/74y3751gsixaz9797ib0hp7c658sp1y5-binutils-2.40/bin/ld: /tmp/ccy7Qxyb.o: in function `main':
foo.c:(.text.startup+0x32): undefined reference to `scanf_s'
/nix/store/74y3751gsixaz9797ib0hp7c658sp1y5-binutils-2.40/bin/ld: foo.c:(.text.startup+0xca): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status

[Hydro](https://hydro.ac)提供评测服务